I cannot boot Ubuntu 19.10 on my HP laptop suddenly. When I try to, it freezes on the booting screen. I do not know if this is related, I changed the user password before it won't boot anymore. Is there a solution to this? By the way I boot the OS via a USB hardrive.
It actually used to boot and it worked smoothly until I cannot boot it anymore.I had upgraded it from 18.04 a few weeks ago.
Edit2: I am using hp 240 G4. I cannot reset as I have stored a lot of work in it. When I booted it in recovery mode the last output is 'Stopped read required files in advance.'And it won't advance further. how can I solve this?
Edit3: The hard drive I am using to boot is /dev/sdb2.Should I run fsck /dev/sdb2 -v in root shell in recovery mode?
Edit4: I cannot enter my root password in the root shell prompt.it says password incorrect.How can I change my root password?